Financing Arrangements (Details 4) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Long-term debt
Total	$ 1,717	$ 1,724
Fair value adjustment related to hedged fixed rate debt	13	20
Long-term debt	1,717	1,724
Long-term debt maturities
2015	350
2017	500
2020	600
2037	250
Guaranteed obligations of consolidated subsidiaries	225	93
4.625% senior notes, due November 1, 2020
Long-term debt
Debt, interest rate (as a percent)	4.625%	4.625%
Long-term debt
Total	399	399
Long-term debt maturities
Discount	1	1
3.2% senior notes due on November 1, 2015
Long-term debt
Debt, interest rate (as a percent)	3.20%	3.20%
Long-term debt
Total	350	350
1.8% senior notes, due September 25, 2017
Long-term debt
Debt, interest rate (as a percent)	1.80%	1.80%
Long-term debt
Total	298	298
Long-term debt maturities
Discount	2	2
6.625% senior notes due on April 15, 2037
Long-term debt
Debt, interest rate (as a percent)	6.625%	6.625%
Long-term debt
Total	257	257
Long-term debt maturities
Premium	8	8
Discount	1	1
6.0% senior notes, due April 15, 2017
Long-term debt
Debt, interest rate (as a percent)	6.00%	6.00%
Long-term debt
Total	200	200
5.62% senior notes due March 25, 2020
Long-term debt
Debt, interest rate (as a percent)	5.62%	5.62%
Long-term debt
Total	$ 200	$ 200